OTCA
OpenTelemetry Certified Associate (OTCA)
More study resources
Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The OpenTelemetry Certified Associate (OTCA) is a multiple-choice credential for engineers who work with OpenTelemetry, the vendor-neutral framework for generating, collecting, and exporting telemetry. It suits SREs, platform and DevOps engineers, backend developers, and observability specialists who instrument services, run a Collector, or maintain telemetry pipelines. The exam is organized around six domains: fundamentals and concepts; the signals (traces, metrics, logs, and baggage); automatic and manual instrumentation; Collector architecture and configuration; context propagation and semantic conventions; and deployment, operations, and troubleshooting. Questions test practical understanding rather than trivia - expect scenarios about choosing a receiver or exporter, wiring a pipeline, reading an OTLP payload, or diagnosing why spans arrive without a parent. Preparation works best in layers: read the official OpenTelemetry documentation end to end, then build a small demo app with the SDK and run a local Collector so each concept has a hands-on anchor. Practice interpreting YAML configuration and tracing a signal from instrumentation to backend. This page is independent study material and is not affiliated with or endorsed by the certification body; always confirm exam logistics on the official site before booking.
What you'll study
About OTCA preparation
What is the exam format?
It is a multiple-choice exam. The official certification body publishes the current question count, time limit, and delivery details on its website, so check there before scheduling - those specifics change and should not be taken from third-party summaries.
How hard is the exam?
It rewards working familiarity over memorization. Candidates who have instrumented a service and configured a Collector generally find the scenarios manageable; those relying only on reading struggle with configuration and troubleshooting items. Hands-on practice is the best difficulty reducer.
How long should I study?
Most candidates need several weeks of part-time study. A reasonable plan is two weeks reading the official docs domain by domain, then two weeks building a demo app with SDK instrumentation and a local Collector pipeline. Adjust to your existing observability background.
In what order should I study the domains?
Start with fundamentals, then signals, because everything else assumes you know the data model. Move to instrumentation next, then Collector configuration, since pipelines make more sense once you know what produces the data. Finish with context propagation, semantic conventions, and operations.
What are common failure modes?
Weak spots tend to cluster: confusing sampling decisions with export behavior, mixing up Collector component roles, forgetting that context must be propagated across process boundaries, and misreading semantic convention attribute names. Practicing troubleshooting broken pipelines addresses most of these.
Do I need to know a specific programming language?
No single language is required. Questions are conceptual and configuration-oriented, though examples may appear in common languages. Being comfortable with one supported SDK helps you reason about spans, meters, and resource setup, but the exam is not a language test.
How much Collector configuration do I need to know?
Enough to read and write YAML confidently: receivers, processors, exporters, and the service pipelines that connect them. Know how data flows through a pipeline and how to spot a misconfigured component. Rote memorization of every option is unnecessary.
What happens if I fail - can I retake it?
Retake rules, waiting periods, and any fees are set by the certification body and change over time. The official site publishes the current policy, so confirm the retake terms there rather than relying on secondhand information.
How do I register and what does it cost?
Registration, scheduling, and pricing are handled entirely by the official certification body. Visit its website for the current fee, available appointment times, and any accommodations. This page is independent study material and cannot book or price the exam for you.